Best Listening Room?


I am considering building an addition to my house, and figured I'd build a dedicated listening room while I am at it. So the question is, what is the best listening room one can reasonably build? Should it be square/rectangular or have tapered walls? Round corners? Should the ceiling/roof be high or low? Flat or angled? What is the best floor, wall and ceiling covering material? Etc etc... In other words: If you were to start from scratch, what would be the best room you could build?
njonker
I'm a building contractor. Of course the stable wall is on the outside. My concerns regard the ability of the "Wall on rollers" to not make noise or shake , rattle and roll during passages with extreme low frequencies. Ever hear one of those kids with 4 15 inch subwoofers in their car at the stoplight? That's where my concerns lie.
Tough area.....where do you begin, Dollars or(good) sense? I'm currently fighting with myself over the same dilemma. At this time I'm considering a round room, with a diameter of about 32 feet and 12 feet high...with two (2) interior walls, one (1) at each end; to be used as a home theater and sound room. I'm a architect, and have been fortunate enough to have built a couple of great sounding rooms, but this is a new wild hair.... catalogwiz
My $0.02: If I were going to build a dedicated listening room, I would hire a professional who does that for a living. There are so many companies that build studios, and I've seen them mention they also do personal listening rooms. I know Michael Green does this. Good luck.